Thread-cutting machine.



A. M'. SAUNDERS & O. M. MOWAT.

THREAD CUTTING MACHINE.

AYPLIOATIOH FILED AG. 4, 1911.

Patented OC. 8, i912.

4 SHEETS-SHEET 2.

1 E u TN ESSES INNTORS .Application led Augus 4, l.

To all 'whom it may com-ern:

Be il; known that we, ilnons'iifs Silen- L@ne object of' oni invention is; to ii-wille an :uiten-nii; hi'emhng nine/lime having mechanical ineens l i' eueeese-i ely gsipping the pipe oi' ethei ex'liele he, threaded, bringing ihe emi of he gripped pipe and the threading lie inl@ engageineni, and for Sininliuneonsly i' lining; *ehe q meel nnisin eno @peni lhe tine; e l' Jhe linie' of the xhe :lrein 'Lie il eil pipe, ihejs-ipe he. if position oenveen ii inne e' d i mechanism and the c iecl len@ has been cnt-upon its enel, i'ihont z :inee frein the opeinloi ohei' than nl` ille pines in posiiion hein'een il e grip 'uws :incl removing' he threaded es Ai'oni ef i.

bet-Ween the open "mi e pletion off lie lin` ihei' 'ef i i of The i vid euiijing insane: wher lhe thread en e, giudnfilly i'eli'neled in enine *me ihieefis en u (wiper und Further ierneecl fier coniY pletion oi' lie i'eonii'ecl lengt-li of ilnezi, El lfm-ilse? olljef; o ihe invene Gi provide :i thread cutting' machine novel :nenne for feeding Ylih l (li elle Thread enfing fifi-eil sneed, eoi.'1' -,si,ionclinf life lii' .m e ol the niii'eneliiiigj (lie A Sill i'nrthei ohjieei: offlie io pioviifle adjustable ineens Whe 'Y oi" a levi h vvieh een he Y automatically ent upon successive pipes iifier the pipes are plneecl in position in jthe inaehine lv ihe operate?.

A s l inilhei object-o1" this invention .is to provide e thread cutting inziehine having ineens whereby a complete cycle of operation is carried oui: mechanically in a given interval including gripping' tl'e pipe, cui-- ling fha desired lengh of thread thereon, releasing the threaded pipe and opening or reime the hits of the threading dies so esi; ao cheengnge lhe pige incl the hits and peiniii the reinem-l of a lnezidecl pipe Wihont nnseiewing and the placing of an nnlhi'eanlecl pipe in posiiion in the machine so es; io iieiehy linit ilie time involved in cui` l'nigfzi given length of hifeacl upon the end @if each pipe, and compel the etention of the operzifor in l i e' inil removing J(he pipe :i regulr iniervnle enel drawings foiniing pari', l iS a. sectional. j niieefl Cutting 'eppei eel in :woei-dig. 2 is a e' same on the 3 is e. similar owing (in Closed pl ipp' ehenisi: if; inveniion l n iv e' illu ence wi'li ionnl end Vl-li of' Cs 7 lle inlve eeniolj i"ng ene closing movements of g' ineeininieni. Fig. S ie showing e. Clelening; the elim he cem gi'oevee UI b ff. Si is :i irene i "ie line QX o1 i() a similar 'ransverse seeen lhe line KMX ef Fig. 8. .eeoinnenying drawings the nn- '.'lnnes hollow spindle or shaft vwhich the flange Il on the inner end ot' the thread Cutting die 5 is removably secured (to permit or' various aires being used) by means of bolts G.

The outer end of the threading die is provided with a series it radially extending thread cutting* bits 7 arranged to move radially inward into cutting position and to be radially retracted .or Inoved radially outward as the thread cutting operation progresses and further retracted at the coin- Jletion of the necessar 'leirfth of thread soV as to clear the threads out upon the pipes 'or other materials operated upon and permit their withdrawal from the threading die 5 Without. being backed out or nnserevved therefrom.

The spindle Q is rotatably mounted in ring oiling bearings 8, 8, mounted upon the base or 'traine 9 of the apparatus.' The ring oiling bearings beingr of an old and well known construction are not further described.

The base 9 is provided with marginal bottoni flanges arranged to support the thread. cutting machine upon a suitable foundation, or as shown, to support the apparatus Witlr `in an, oil pan 10 which rests upon .the foundation 1l.

On the outer or front. end of the base S) is an extension 1Q ha ving` its top surfaces constructed to :l'orin horizontally extending Shears or ivz'iys lf3, 13, which support the horizontally reciprocating carriage i4; 'for the gripping ineelninisn'i.

The carriage lialhas a if'ertically depending flange AQ in which a guide ref' as l5 is formed for the 'vertically and horizontally movable lloating' slide il?. The recess 'l5 is niade slightly wider lian the slide lli to permit a small amountv oll 'transverse horizontal nioven'ient. 'lflio slide has: i. central rib 'l forming vertically extending` 'lorlred arms terminating al` their upper ends in bosses 1S, lS, having' openings in whirh the pivot pin '19 for the knees or bent lever arios 20, 2l. is secured and terminating at. their lower ends in flanges .l, to which 'the actuating cylinder t'or the gripping nieohanisin is fixed.

Brackets 2i-gl, 23, extend trono opposite sides of the rib 17 and are adapted to engage with and be supported by the 'inner ends of the two counterbalance lovers 24. ill, 'whieh are pivoled al. an inlir-.rinediate point lenoth wise to lugs 25, on the lorver end ot the vertically depending-ilange toruiing part ol the carriage 1.4. Conn'erweights 2G, 2li, ad,- jnstably secured `on tho opposite or outer ends of the levers -l, 2l, are elnployml to yieldingly maintain Vthe gripping mecha nisin in position vertically with respoi't to the threading die The knees or bent arms 2l), 2l. pivotally scoured to the bos i8 on the slide 'i7 by the pivot pin 19, have horizontal fares on which the blocks or holders? are adjust ably secured. These blocks or holders have openings or slots in one side surface in which the pipe gripping bits Q8 are removably secured. The blocks are adjusted tov- Ward and away from each other to suit the varying sizes of pipes threaded by the apparatus by means of' adjusting bolts Q9 and are held in adjusted position by the bolts 30. Lock nuts Q9 also serve. to maintain the bolts 29 in position.

The lower ends ot the. lniees 20 and 2l are connected together by means ol the pine Bl and 32 and the toggle links 33, the inner ends oit these links also being connected by the pin 'to the head Slon the piston d5 for the cylinder 36 by which the gripping mechanism is actuated. l

The cylinder 3G, which is secured to the flanges 22, 22, on the lower end of the rib 17 forming part of the slide 16 is divided translversely into two sections, the abutting Iends of the sections having flanges 37 secured together by bolts 38. The-top section of the cylinder 3G is provided on eacn ond with a st/uiting box in which glands 3E) and lo are secured. The lower end ot the piston which piston extends through the stuiiing boxes and glands 35h and lil). is arra, enter the lovfer ser Vion ot the. ejvlin this lower section being eonst-riu'fted, inelose the s! idling boxl and irland ff Way proiiding a doulile acting cylixulel actuating the gripiizing niorhaniezin. I The on positie ends oil' the cylinder lo have noel Whirh are. eonneelei'l by lle Ae bonne .il all, to the four way operatl valve seoured lo one side of' the 'lie-aine. il ot the pipe ilu-nadir machine and through wlaieli fluid pressure is supplied to the oppor. te ends oit Jie cylinder Elli.

Secured in the lugs or ears. -l-l. -l-f-l, provided along one side oit the upper tace il liuA 'arriago lel a rocking ahalt l5 ha a lever 'lo splined thereon so z to be aflinstable along the length oit theshaftv fl-i be tween. the lugs -l-l and torni a` target or slop which moves into and out ol position to iw, engaged by the pipes when bring.'- placed 'oetween the gripping jaws and so ii ulair the length ol thread out upon the enf. .g ot [be pipes. Nuts -li' on the. :shaft lo engaging .the opposite sides of the lever Alll .serve lo more and hold this lover in its ad; por-:iliona Keyed or otherwise .serio-ed upon the .elia It. adjacent to one rnd thereof is :L short lever arni 4S and the outer end olv this lever is connected by thiA link lli uilh the linee. or bent arm 2l so that when the knees 20. ill. are moved by the piston 85 in the cylinder 36 the rocking .shall lo is arluated to swing the target orstop /ll into and ont of itel oporal'ive position.

Boiled or otherwise iria",

rate of speed corresponding; to the pitch of 'of the pin on the carriage arm 50 is v ot the drum also provided with members i ,ertoe-ea o the carriage le is a horizontal carriage arm which is movahly secured in Stationary hearings or Ways 5l, 5l, on the trame 9, and which is varranged to move the carriage 141 during the thread cutting operations at a threads hoing out upon the pipe. The c, er end oit' the arm 5() is provided with tivo or more openings in which pins 52 and are removably secured, these pins having; anti-friction rollers 52', 53 onI their lower ends.

Transverse openings 54 or holes'are provided at an intermediate point in theleng'th of the. pins 5; and 53 in which smaller pins are placed to hold the pins and 53 in lifted position on the Carriage arm 50 so as to' not project downwardly below the bottom surface ot the arm 50, into engagement with the @am surfaces provided on the cam drum located on the Vframe 9 beneath the carriage arm 50 and hollow spindle 2.

Mounted in the hushed hearings 55, 55, which are removably secured on the interior of the frame is a rotatable shaft 56 having a cam drum''flrevved or othervviseseoured therea'rn and a spur driving gear Wheel 58 is also mounted on the shaft 5G for drivingthis drum, shoY '11, (Fig. 1), the driving gear r58 being bolted to one end of the drum 57.

The peripheral surface of the Cam drum 5.7 is provided with members removably securedtliereon as shown, having opposite cam surfaces and 59a forming a cam Vgroove G0 on the drum into which groove the anti-frietimi roller (on the lovver end eaused to extend and operatively connect carriage le with the cam drum when cutting; threads of one pitch. rthe periphery homing; opposing cam surfaces 6l, ola and (i2, (S22L which torni a second cam groove G3 on the periphery oit the Cam drum into which groove the anti-friction roller 53 on the pin 53 is adapted to extend and operatively connect the cam drum With the carriage le during the thread cutting operationsl in cutting' threads of a ditferent pitch on the ends ot piges held on the carriage 'lil hy the pipe gripping mechanism. (A devolopi'nent showing the relativo location of the members forming the` cam grooves o() and ('33 and also the cam dog (56 .is shown in Fig. S). y

rlho carriage arm 50 which operatively connects the cam drum 57 with the carriage llt has av lengthwise extending recess in its bottom eurfaoo in 'which the longitudinally movable finger har Srl placed. The 3:' har (3l-l has a pin $5 adjacfiwh' 'oa .e downiv? ra e . surface 66 on the cam drum 57 which at each revolution of the cam drum contacts with the anti-friction roller on the lower end of the pin 65. The tin har G-t is gradually 'moved in the opposite direction (right to lett in Fig. l) When engaged by the end oiy the serevv 6T which is adjustably Secured in the end of the carriage har 50, this gradual movement actuating the Wedges 7a to move outivardbT or retract the cutters or hits in the die. head 5 and form aV taper thread on the pipe held between the gripping jaws. liv/*hen the required `gradual movement has heen edected, the inclined face of Lhe earn dog on the end of thodrum 57 engages with the pin and quickly retraots or moves the cutting hits outwardly for the balance of their radially outward movement so as to clear the threaded pipes. After the cam dog` G5a has enga-ged the pin 65 to move thel hits 7 intotheir Jfully retracted position, continued rotation of the drum 57 Causes the cam surface 66 of the drum 57 to engage the pin 65 'and through the medium of the hefore described connecting mechanism, move the hits 7 toward each other into position to 'engage and again cut a thread upon the end of another pipe held in position between the gripping jaws. The outer end of thefinger har (Se is provided vvith a pin 68' which projects downwardly and is lengaged hy thet'orked outer end of the lever arm G9 forming part of the crank arm 70v which is pivoted on the carriage lll and which forms part of the. mechanism 'for actuating" the radiallv movable threading hits in the threading die l The arm 70 which is swiveled on the vertical post 7l which is fixed to the extension l2 also is forked. and the forked outer end of this arm embraces the oollar or sleeve 7 2 which is Islidahly mounted so as to he aziiall);Y movable on the lianged end' of the threading die 5 in moving` the hits 7 of the threading die into and out of their cutting position.

The length ot the thread out on the pipes varies with different sizes or pipes and the movement ot the lnger haar is practically the same at all times. The relative movement of the carriage arm 50, which reoipro- Cates the carriage l-l, varies with the length of thread desired on the pipes and in order to Cause the hits ofthe thread cuttingr die 5 to he, gradually moved outward in cutting` the tapered threads and rapidly retracted when this length ot' thro; t heen out the screw 57 in the end oi the (carriage arm 50 is adj le to ont vvith the end oli the lil t intervals. 5 l 'it h the (nur n moon L of.:

ed. The armature shaft 74 is provided with :L spur pinion which meshes with and drives the Spui' gem.r Wheel Toy which keyed o11 otherwis)l secured to and rotates 5 the hollow Spindle A second smaller Spui gear T7 which is mounted on ind :rotated by the Spindle 2 meshes with sind. rotates the sectional geen wheel T8 secured to the outei1 overbrenging end of the change gear shaft 79 Whieh is mounted in hushed deed eye bearings 80, S0, ieinovuhly ee 'ed to the freine 9. The shaft T9 ie provided 'with two spur pinions 8l and oi. di'leent sizes, both of which are zii-ranged to, et dif ferent times, lieiin mesh with oud drive ai' ldiffering speeds the idlenspui gear Wheel 83, which ie mounted in dead-eye bearings formed on the swinging gein" tnm Sil. The gear oleo meshes with and gliiv the Spui gein' Wheel 85 splned on the ehiift Elo which is mounted in `the hearings; eeeined to the i' aune 9 of the thread cutting iintehine.

The ifoeking znni S4 has dead-'eye beniinge by which it is pivoted on the shaft So and this erin also i5 niovailile longitudinally on the shaft to permit of the sidewiee movement neen-envy to euift the genre S3 ,and 85 in luinging the idler goei' S3 into u h with one. oir the olheil oi'i' the Spur ws "L and SQ, in changing the Speed of )Je .dion of the ezun di'uni. One end. of the slmit 843 13'- pi-ovided with o Spui' pinion 87 which meshes with the Spui gem' 'Wheel Si?, hy i'vhieh the emu shaft 5G and drum 57 zii-e driven.

A handle 8S is eeeui'ed to the eppoi end of the geni' shitting; alim Silzind the lower end of` a 'piu S9 also secured on this; erin adopted to enter suitable openings or holesl ijn'ovided in the freine 9 of the npiiioifntus to ninintnin vthe umn and gem-s thereon in eaieh of the tivo positions in which the erm 554- of the zlippomlus z s shown may he plaeed.

Secured to the interior ol the iii-:linie 9 in e ifoui 'Wov :ilve 11B (see Fig. 7) hitting outlets eonimeted hy llexilwle Conduite Ell, 92j to the porte on the opposite ends ofthe eviindei' 3G secured on the euiiiugel-l one einployed to netunte the @rippingineeluinienn This vulve also has :in inlet opening,` ill rooneeted to u eoui'ee of oir ov other liuid preesuie .qui nl v .ind :in exhaust outlet open' 92a Whieh ie eenueeted by the valve 'eitii one or the othei` oi the porte 41m-'l2 on the Cylinder 36.

The vulve @i3 hos :i handle 955 hv which it may loe inanii'mliited manually und this valve ie oleo eonneelml to the rook shaft 9.4 through vvhieh the volvo e nievlismimlly 21g* touted to open und Close in meelizuiieelly o ueluziting the gripping; nieelmnisiu :it the right inteimls liv the vom drum. Finger onlus 95 incl 53o ui'e odjustnhly Seemed on one end of' the com di'ln'u 5T so as lo engage with one oi` the otheil of the 'am i'oekiugI G surfe-ees 9T und 9S on the valve veel; slutft Loieee 94: and operate the valve so ne to aetnate the clamping mechanism to lii'st einen id. ztfl'ei Completion oi the thread ein ng opel estone, release the euceeseive 'pipes ploeed .in position between the gripping jamie of the clamping ineehtnieni which e mounted on the .movable earl-inge M.

el iezimev 99 im. un in h nulli extending openile;r in die ie ziii'uiigeti to he onge if'zuieinif end of the pipe liei'ufig` thi'tnun es to veuf. ve :in v hui' preeent on the ende olthe pipes during the thread eutting operations. The consti-notion and use olf the remuer on thieod cutting machines being old and well known not further described. lounted upon a` removable hi'aeket 10() Secured on one end of the freine 9 ofthe :ipimietus is on oil pump 1101 hofvuig au inlet opening piovifded with a pipe L02 extending below the level of the noel of oil collected in the oil pim ll, und :in outlet pipe 103 which connecte the pump with one end of the hollow spindle Q through ,vhiel oil Supplied to the thi-ending die i on the opposite o): outer end of thii spindle.

A. Spur gem' lOl iiieelies on one end oi.L lhalone' lim llii 'le on the g5 i removable shield. itl@ is provi d to eovei the exposed parte of the Spindle f2 he# tween the bearings S, 8, sind ai door ov eovei l0? is removably secured on the fiume l) tiri, elose the 'doorway or openii'ugr through the Side of the hollo'i,7 fin-nie 9. i n

The operation of the upper? "L :le 'followes-Phe finge!l ezuns 95 .find 9o located on the end olf' the coni difiun 57 :foie uiljusled to the requiied positions? und, dei ndingf upon the pitch of the thveaufl to lie euty one oif the other of the )eine und o?, le lowfied until it ie in ite eznn groove (3() oe Gilq ine- Seieiv (3T oleo mliueteo. eo :le t move opening; :u 11h die. The i l1 mung been i'tedU the li-uni :TJ i

to rotule eine. ie linger eem U5 on thc the dx'uni, by engagement 'with the of in sul mee Q17 on the valve roelmie; slitte 1 we 4e to release their iioi. on the oio'e.

aetuates the vave so es to cause ehe gr:

vertical :mii horiz meeila-Iism to grasp the pipec The niet# il movement of the gripping jaws; only iiioree or lifts the target or stop out tiiie Way 5 of the longitudinally movin 5e-e 1116, into "the position Shown in Fig..

continues to rotate the dri 5?, oii Y pins 52 or then in engagement xv, 13am surfaoee on the drum feeds the e 3g riage i@ and the pipe eeeureti tiiereoii.oi'-` Wardiy at a speed. corresponiiiiig te the pitchI l :tieve ignite i oil-tai movement duim operations, ano a eount of the thread beinen eut bf the bits the mie baiaricing the verticali? y D 5 w l n n J t n, die heao e, and aise` through ti'ie tim bm foils oi me gI-lp-g mee-,-

64, grauaily moves'the cutting bits i iii the threading (11e 5 eo es to eut a taper threat?. on f' MTG" `ing machine comprisirig the end of the piper, anni, when one revohitiim .-"a, rotary i eat?. cutting die5 means ttor-d- Aof the cam drum has been madei the cam ing said x, gi'ipgging mechanism hav surface en the carriage eiiti of Athe cam jaws for iiotiiiig :The articles during drum 57 will have engaged with the pin thread ce.

ng operrtionsen vlever for and will have moved thefii/oger (Bliinto` determining the. length of thread crit-upon 5 positiorr'to be again engaged and. moveii iinA tue articles arrange@ to move into anti out" the opposite direction by the @am dog 65aof the path of movement of the artieies be# into the position shown i'i Fig. i and xviii ing threaded, seid die drivingmeaiis White in y have moved the eut-ting bits radiaiijl out operation being arranged to meehenieaiy Ward suicient-iy to clear the 'threads then nctuate 'the oie, gripping mechanism and 9@ out upon the enti of the pipe.. in. eet-,ii revoievci' in pre-arranged sequence. i

lation of che Cam drum, the cam surface Il. thread cutting machine comprising on one end ofthis drum engages with the pin rotary thread cutting die, means iriv- 65 on 011e end of the finger bar Sit and moves me; said die, gripping meei'ianism having 3g it from ieft to right `(Fig. l), se as to, for iieiomg the articles during the through the connecting mechanismq move the thread cutting operations5 lever forming' sleeve 72 and advance the bits T of the e Sten arranged to move into and out of' the threading die 5 toward each otiie; into Closed path of moi/ementI the articles bein@ or thread cutting position.. At the Same threaded to deter iiirx the length ofi time tile filmer cam 95 engages W' the rei. eut f Headed., and ieee-,ie we rocking surece 98 on one emi the vai-ve he gripping meehi'ociz Shaft anti aetuatee the i y which sei@ e admit tiuiei preesure to the ci i into .arri om et opcrxil'vive poeA the cylinder which causes 'theY die iirivii Y enne .vhiie i operai ion e riiafeiimiicuii aetuate the 1:35

'gaping iiiechaiiieiii and lever in A :ttor then removes the se-tiirea ie i iminediateiy replaces it with another ip eci sequence. g

t0 be threaded. .As the apparatus; is bei g t-Wi cutting machine comprising Constantly operated, the time in' which toe euri euttiiigdie,1iieans for driv pipe can Yje removed and replaced between 1 f the gripping; jaws is limited by the rate of Speed. at which the apparatus; op When another pipe has been pieeed b the grippinff jaws by the op' 'zitf'r 1 5G nger 96 on *le eem drinn tt A face on the vaive operat valve to admit iiuiti pie end of the eyiinder 36- ein the pipo grippii'xg juive to coe and another 'pipe between the mp The above described opernt `m continued with successive pipes a Way the pipes are rapidiy auf?. threaded. SG "We claim i. it threat] cutting i'xmeiiine f" a rotary ihrem! cutting' *Y l ed to meemiiieaiy uence. machine comprising .eari heffing bits radi- Q` ilondknndgriping nit/oximnism'having t for ottiing to@ articles oorlog the 1 ting ooerations, a "ve1' arranged to mov@ into ano. outv oi" tho path of movemont oi the articios being tnroded to de- 'mino the length of thread. cut upon the and moans opomtivoly connecting i niooimnisin and Said lever with owed into and ont of holding posi- .'odo'if-l'inined order.

l o Cutting omonimo comprising from@ rotry hood having bits mdniijy movable into and outof thread cuttin f position, means for positively rotating :sait head, a support movabio toward and :may from the rotary bend having gripping jaws mounted thereon, means; carried on said support for actuating the gripping jaws ,and a com operotivoiy connected to said 'hond rotating means, said com being urranged to m"'uate the gripping jaws and movetho bits into cutting position in the rotary head7 bring nrtiolofi 'hold between the gripping jaws into thread cutting engagement with the nbits in the, head, and thon retract the, bits :md releus the gripping jaws after completion of the thread cuttingr oporotions in the order mined.

In 'testimony whereof, We have hereunto set our hands.

AUGUSTUS M. SAUNDERS. OLIVER M. MOYVAT. W'tnessef Simon JAS. P., Dwars. 

